Configuring Access Point Groups

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Prerequisites for
Configuring AP Groups

The following are the
prerequisites for creating access point groups on a
switch:

The required access control
list (ACL) must be defined on the router that serves the VLAN or subnet.

Multicast traffic is
supported with access point group VLANs. However, if the client roams from one
access point to another, the client might stop receiving multicast traffic,
unless IGMP snooping is enabled.

Restrictions for
Configuring Access Point Groups

Suppose that the interface
mapping for a WLAN in the AP group table is the same as the WLAN interface. If
the WLAN interface is changed, the interface mapping for the WLAN in the AP
group table also changes to the new WLAN interface.

Suppose that the interface
mapping for a WLAN in the AP group table is different from the one defined for
the WLAN. If the WLAN interface is changed, then the interface mapping for the
WLAN in the AP group table does not change to the new WLAN interface.

If you clear the configuration on the
switch, all of the access point groups
disappear except for the default access point group “default-group,” which is
created automatically.

The default
access point group can have up to 16 WLANs associated with it. The WLAN IDs for
the default access point group must be less than or equal to 16. If a WLAN with
an ID greater than 16 is created in the default access point group, the WLAN
SSID will not be broadcasted. All WLAN IDs in the default access point group
must have an ID that is less than or equal to 16. WLANs with IDs greater than
16 can be assigned to custom access point groups.

We recommend
that you configure all Flex+Bridge APs in a mesh tree (in the same sector) in
the same AP group and the same FlexConnect group, to inherit the WLAN-VLAN
mappings properly.

Information About Access Point Groups

After you create up to 512
WLANs on the
switch,
you can selectively publish them (using access point groups) to different
access points to better manage your wireless network. In a typical deployment,
all users on a WLAN are mapped to a single interface on the
switch.
Therefore, all users that are associated with that WLAN are on the same subnet
or VLAN. However, you can choose to distribute the load among several
interfaces or to a group of users based on specific criteria such as individual
departments (such as Marketing) by creating access point groups. Additionally,
these access point groups can be configured in separate VLANs to simplify
network administration.

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